Heavy duty container

ABSTRACT

A heavy duty container is formed from cut and scored paperboard sheet material and comprises first and second scored blanks each including main and side foldably connected panel elements with auxiliary panel elements foldably connected to each other. The auxiliary elements are foldable to position to define a tube with the side panel and having a double thickness wall therewith. The cut and scored blanks are placed and secured in position with respect to each other to define three tubes with the endmost of the tubes provided with double thickness side and end walls. A closure structure is provided for at least one of the soconnected tubes, and the tubes may be provided with flaps to provide additional thickness of material at the lower end of the container to cause same to be especially resistant to flowable materials within the container. The center of the three tubes may be provided with a liner so that it also has double thickness walls.

United States Patent 1191 Taylor 1451 July 10, 1973 HEAVY DUTY CONTAINERPrimary Examiner-Davis T. Moorhead [75] Inventor. llzszph W. Taylor,Fnendswood, Attorney carpenter, Ostis & Lindberg 73 Assi nee: ContainerCo ration of America, 1 g Chicago, In 57 ABSTRACT [22] Filed: June 1,1972 A heavy duty container is formed from cut and scored paperboardsheet material and comprises first and sec- PP N-1'258,523 nd scoredblanks each including main and side foldably connected panel elementswith auxiliary panel ele- {52 us. (:1. 229 23 R, 229/15 hhdahly hhectedeach The auxiliary 51 Int. Cl 365d 13/00, B65d /48 elemFhts are f flehhea with [58] Field or Search 229/23 R, 29 R, 29 C, the side panel andhaving a double thickness wall there- 229,29 D 29 E 29 F R with. The cutand scored blanks are placed and secured in position with respect toeach other to define three tubes with the endmost of the tubes providedwith dou- [56] SQEFE SZF ble thickness side and end walls. A closurestructure is provided for at least one of the so-connected tubes, and1,91 Andrews R X the tubes may be rovided flaps to provide addig'ggggg5:33:15; 3]. tional thickness of'material at the lower end of the con-2968'397 [/1961 Cantrell 206/ R tainer to cause same to be especiallyresistant to flowa- 3:058:644 10 1962 zaszmw'wfnjfl i :1... 229/15 blehhtehals the The cent of the 3,252,646 5/1966 Rockefeller 229 15 threetubes may be Provided with a liner that it also 3,425,615 2/1969 Wood229 15 has double thickness. Walls- 3,542,991 12/1970 George et al.229/15 3,628,718 12/1971 Broyles 229/23 R x Chums 11 Flllhl'es 1 HEAVYDUTY CONTAINER BACKGROUND OF THE INVENTION 1. Field of the Invention Thestructure according to the present invention is particularly suitablefor heavy, flowable materials such as synthetic rubber polymers, whichcoalesce and impose large pressures against the walls of a containertherefor.

2. The Prior Art The closest prior art found in a search are thefollowing U.S. Pats.:

Cantrell, Sr., No. 2,968,397,.Ian. 17, 1961, 206/65; Rockefeller, No.3,252,646, May 24, 1966, 229/15; Wood, No. 3,425,615 Feb. 4, 1969,229/15; George, No. 3,543,991 Dec. 1, 1970, 229/15.

The structure herein distinguishes from said patents, it is believed, inthat a pair of blanks are folded in such a fashion as to define threeside-by-side tubes, the endmost tubes of which have double thicknessside and end walls. The invention also comprehends flap structuresextending from the so-connected tubes, these flap structures beingfolded to position to define bottoms of extra thickness or lower sidewalls of extra thickness to resist deformation imposed by the loads inthe container.

THE DRAWINGS FIG. 1 is an exploded view of a container constructed inaccordance with the teachings of the present invention;

FIG. 2 is a plan view of one of a pair of cut and scored blanksforforming a container structure comprised of three connectedside-by-side tubes;

FIG. 3 is an isometric view of the blank of FIG. 2, to a reduced scale,and showing glue patches placed thereon for the forming of tubestherefrom;

FIG. 4 is a view similar to FIG. 3 showing a folding and gluing stepperformed on the blank;

FIG. 5 shows the blank of FIG. 2 folded and glued to partly define oneof the end tubes;

FIG. 6 is a schematic view showing a pair of blanks placed and securedinto position to define a structure which may be unfolded to definethree tubes having the endmost tubes thereof provided with exposeddouble thickness side and end walls;

FIG. 7 is a'schematic view showing the structure of FIG. 6 unfolded, butwhen viewed from the opposite end;

FIG. 8 is an isometric view showing one of the blanks having the endflaps thereof folded to position to define bottom closure elements;

FIG. 9 is an isometric view of a sleeve adapted to be inserted into thestructure seen in FIGS. 6 and 7 to provide double thickness walls in thecenter-most of the connected tubes;

FIG. 10 is an isometric view showing the manner in which theso-connected tubes may have a bottom closure structure placedtherearodnd; and

FIG. 11 is a view similar to FIG. 7, but showing a different arrangementof the blanks and the gluing thereof.

The improved heavy duty container according to the present invention isdenoted by the reference numeral and is shown in combination with abottom closure or tray T for reinforcing the lower end thereof.Container 20 is formed from a pair of cut and scored blanks 20A, each ofsaid blanks including a main panel 21 and a side panel 22 foldablyconnected thereto along a fold line 23. Auxiliary panel elements 24, 26,27, and 28 are foldably connected to each other along fold line 29, andauxiliary panel element 24 is foldably connected to the side panel 22along a fold line 31. Each of the aforesaid panel elements is providedwith a flap, these being denoted by the reference numerals 21A, 22A,24A, 26A, 27A and 28A, all of said flaps being connected to the panelelements along a common fold line 32.

The side panel element 22 has a glue patch GP thereon, and auxiliarypanel element 28 is folded into face-to-face contact with side panelelement 22 to provide a tube as seen in FIGS. 4 and S. A pair of thestructures seen in FIG. 5 are secured to each other, and main panelelement 21 has a glue patch GP thereon which affords a means of securingit to an auxiliary panel 24 of the other of such cut and scored blanks20A. The gluing operation is achieved as seen in FIG. 6 where the twoblanks 20A are fblded in the manner shown and pressure placed thereon tocause good adhesion therebetween.

As seen in FIG. 7, when the structure of FIG. 6 is unfolded, there willbe defined three connected tubes, the endmost of such tubes havingexposed double thickness side and end walls.

If it is desired to have the center of the connected tubes provided withdouble thickness walls, a sleeve S is provided, sleeve S having opposedmain panel elements 33 and opposed side panel elements 34 foldablyconnected to each other along fold lines 36. The bottom end of thesleeve S may be closed by flaps 38 and 39 foldably connected to thelower ends of the panel elements 33 and by flaps 41 foldably connectedto the side panel elements 34.

The structure thus far described lends itself to the shipping of suchmaterials as rubber polymer which is extremely sticky and capable ofadhering to corrugated container material. According to the inventionherein, the exposed inner surfaces of the blanks 20A may be coated witha material, such as well-known silicone compounds to resist adhesion ofthe polymers. In like fashion, the inner surface of the sleeve S may becoated with such material so that all three of the tubes are properlylined with material resisting adhesion of the polymer.

As seen in FIG. 8, the closure elements 24A, 26A, 27A and 28A are foldedto closing position to provide a bottom closure for the end tubes. Whenthe sleeve S is formed as described and the closure elements 38, 39 and41 thereof folded to closing position, all three of the so-connectedtubes have the closure structures described.

The flaps 21A and 22A of the main and side panelelements 21 and 22 arefolded up against the sides of the panel elements 21 and 22 as seen inFIG. 10 to provide additional thickness plies near the bottom of thecontainer 20.

A bottom closure structure in the form of the tray T seen in FIG. 1comprises a main rectangular panel 42 having opposed side elements 4.3foldably connected thereto and foldable up into position against theflaps 21A. The tray T also comprises end panels 44, and the ends of theside panels 43 have flaps 46 extending therefrom which are foldable intoposition against the flap 22A, flap 44 being foldable against the flaps46. It

will be understood, of course, that the elements just described areglued or otherwise adhered.

Referring again to FIG. 1-, the panels 20A may not be provided with theflaps 21A to 28A extending therefrom, and in such cases, thereinforcement of the lower end of the container is not as extensive ashas been previously described. It will be appreciated, of course, thatthe top of the container seen in FIG. 1 may be closed by a similar trayT. l

In FIG. 11 there is shown an alternate manner of arranging the panelsforming the container body. Essentially panels 21 and 22 areinterchanged and panels 27 and 24 made longer than their counterparts asin FIG. 7. The claimed subject matter is generic to both forms; this isbelieved evident.

It will be apparent that a heavy duty container has been provided havingadditional reinforcing structures along the bottom portions thereofwhere the pressures from a flowable material are the greatest, thuspreventing distortion and rupture of the container under load.

I claim:

1. A heavy duty container formed from paperboard sheet material andcomprising:

a. first and second cut and scored blanks each including:

i. main and side ments;

ii. auxiliary panel elements foldably connected to each other and tosaid side panel element;

iii. said auxiliary panel elements being foldable to foldably connectedpanel eleand secured in position to define a tube with said side panelelement and forming a double thickness wall of said tube withsaid sidepanel element;

b. said cut and scored blanks when so formed being placed and secured inposition with respect to each other so that the tube formed from one ofsaid blanks is placed in position on the main panel of the other of saidblanks to define three tubes with the endmost of said tubes havingexposed double thickness side and end walls;

c. a closure structure for said connected tubes.

2. A container according to claim 1 wherein said auxiliary panelelements are provided with flaps foldable to position to provide abottom closure for the endmost of said row of tubes.

3. A container according to claim 1 wherein said center of said tubes isprovided with a liner providing a double thickness wall for all of saidtubes.

4. A container according to claim 3 wherein said liner is provided withflaps foldable to position to provide a bottom closure for said centertube to provide bottom closures for all of said tubes.

5. A container according to claim 1 wherein said main and side panelelements are provided with flaps foldable against said main and sidepanel elements and lie between the same and said closure structure toprovide a four-ply wall thickness at the bottom portions of saidcontainer.

1. A heavy duty container formed from paperboard sheet material andcomprising: a. first and second cut and scored blanks each including: i.main and side foldably connected panel elements; ii. auxiliary panelelements foldably connected to each other and to said side panelelement; iii. said auxiliary panel elements being foldable to andsecured in position to define a tube with said side panel element andforming a double thickness wall of said tube with said side panelelement; b. said cut and scored blanks when so formed being placed andsecured in position with respect to each other so that the tube formedfrom one of said blanks is placed in position on the main panel of theother of said blanks to define three tubes with the endmost of saidtubes having exposed double thickness side and end walls; c. a closurestructure for said connected tubes.
 2. A container according to claim 1wherein said auxiliary panel elements are provided with flaps foldableto position to provide a bottom closure for the endmost of said row oftubes.
 3. A container according to claim 1 wherein said center of saidtubes is provided with a liner providing a double thickness wall for allof said tubes.
 4. A container according to claim 3 wherein said liner isprovided with flaps foldable to position to provide a bottom closure forsaid center tube to provide bottom closures for all of said tubes.
 5. Acontainer according to claim 1 wherein said main and side panel elementsare provided with flaps foldable against said main and side panelelements and lie between the same and said closure structure to providea four-ply wall thickness at the bottom portions of said container.